Intel BX80646I54690K Core i5-4690K Processor (Sockel 1150, 4x 3,5GHz)
This have 0,4GHZ more than my last found cpu by Intel.
I don't know is that better?
...
And is my nVidia GeForce 8500gt good enough for gc/wii games?

Nope , it's too old and weak
I think you should get a cheaper CPU and use extra money on new GPU . Sth like EVGA GTX 750 will do
If you live near Microcenter store , you can get both Pentium 20th Anniversary G3258 and MSI Z97 mobo bundle for only $100 ($90 after rebate) . If you don't then just get the Pentium with Asrock Z97 Anniversary mobo

Nope , it's too old and weak
I think you should get a cheaper CPU and use extra money on new GPU . Sth like EVGA GTX 750 will do
If you live near Microcenter store , you can get both Pentium 20th Anniversary G3258 and MSI Z97 mobo bundle for only $100 ($90 after rebate) . If you don't then just get the Pentium with Asrock Z97 Anniversary mobo

I had an i5-4670k and could hit 4.2ghz on OC, I very recently upgraded to an i5-4690k (found a good slickdeal, sold the existing CPU - it was basically a free upgrade). On the i5-4690k I can only OC to 4.4ghz, I can't get 4.5ghz stable on any settings. So it's not that much better on overclocking imo. Of course the silicon lottery plays a role, just seems like from what I've read people are hitting 4.6ghz pretty easily. Maybe I just the lottery again. Regardless, the i5-4690k is a great chip, and even @ 4.4ghz it crushes all Dolphin games that I've thrown at it.